Portable speaker system



FIG. 1 is a perspective view of the portable speaker system;

FIG. 2 is a top elevation view thereof;

FIG. 3 is a bottom elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a back elevation view thereof.

The broken lines indicate unclaimed portions and from no part of the claimed design. 

CLAIM The ornamental design for a portable speaker system, as shown and described. 